add deactivation module

[circlecube]

Proposed changes

This adds the deactivation module as well as automated cypress tests to ensure that it functions properly. The deactivate link for this plugin now opens a modal and requests user feedback on why they are deactivating the plugin. The modal can be canceled, skipped, and submitted with a user-generated reason (which is submitted as event data), all of which have tests in place.

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments